Converting combined process wastewater to ZLD.
Oasys Water and Beijing Woteer have partnered to treat and recover the large quantity of wastewater produced by the Zhongtian Hechuang Energy Corporation, currently the world’s largest coal-to-olefin project. In order to achieve zero liquid discharge (ZLD) as mandated by regional authorities, Oasys Water’s award-winning ClearFlo Membrane Brine Concentrator (MBCTM) and Beijing Woteer’s complete pretreatment system work together to process 5,760 m3/day of wastewater. To meet the priorities of efficiency and operating flexibility, the innovative forward osmosis (FO) based system performs the majority of water recovery, offers reduced electricity and steam consumption and maximizes recovery of product water across a range of feed conditions. The flexibility of the complete system allows for wide variability in volumetric feed rate and quality of inlet water.